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Remote Desktop puzzle that is beyond me...

Discussion in 'Networking (Hardware & Software)' started by grindy, 2009/08/10.

  1. 2009/08/10
    grindy

    grindy Inactive Thread Starter

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    Hi,

    I have 2 computers that both run Vista and I have used the laptop in the past to access the desktop via RDC. This past weekend, from one outside location, I tried to connect as in the past but couldn't. The message from Vista said it couldn't connect. I checked all my firewall settings (including turning off the firewall within Trend Micro, and using Windows Firewall that is set to allow RDC).

    Here's the wierd part. I can connect sucessfully from one wireless network (not mine, a neighbors) every time, but when I try to connect from another wireless network (a different neighbor) I cannot connect. I can repeat this every time.

    Nothing has changed on my laptop or my desktop. I connect sucessfully from one external wireless but not from the other. How can this be?

    Please tell me what I'm missing...

    Thanks for any input,
    bob
     
    grindy,
    #1
  2. 2009/08/10
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    Maybe one neighbor is stealing service from you and the other one isn't:eek:

    You are using an IP adress other then a 192.xx.xx.xx (local internal) address aren't you?
     
    Steve R Jones,
    #2


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  4. 2009/08/10
    grindy

    grindy Inactive Thread Starter

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    Neither is using my wireless network, and the IP I'm using is not the local 192.xxx but the actual IP from my cable company.

    I'm not completely new to this, and as I mentioned, I've done this many times before.
     
    grindy,
    #3
  5. 2009/08/10
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    Sorry...Have to get some questions out of the way.

    Sounds like it's narrowed down the one neighbor's setup isn't letting you out. Look in his routers setup to make sure RDP aka port 3389 isn't being blocked.
     
    Steve R Jones,
    #4
  6. 2009/08/10
    grindy

    grindy Inactive Thread Starter

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    Hi Steve,

    Thx for the reply. I'm confused here. Isn't Port 3389 only relevent on the router of the system BEING accessed, and not involved for routers being accessed by the CLIENT?
    In other words, port 3389 is used by the SERVER's router to allow network traffic (in this case RDC) to flow thru to the SERVER machine.

    Please advise...
    thx
     
    grindy,
    #5
  7. 2009/08/10
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    I've always understood 3389 is used both directions.
     
    Steve R Jones,
    #6
  8. 2009/08/10
    grindy

    grindy Inactive Thread Starter

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    Well, then if that were the case, then using RDC from outside the LAN would require every wifi connection (Starbucks, etc) to be configured for RDC and I don't think that's the case... is it?
     
    grindy,
    #7
  9. 2009/08/10
    Scott Smith

    Scott Smith Inactive Alumni

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    No he's saying the other router may have a firewall policy that is blocking outbound 3389. Not 3389 specifically but may be blocking everything but 80.
     
    Scott Smith,
    #8
  10. 2009/08/10
    grindy

    grindy Inactive Thread Starter

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    Ok, I think this is the key. I have been trying to use RDC from this laptop unsuccessfully from this location ( my daughter's home wireless network ). I just went into the Motorola Modem/Router combo configuration and told it to allow TCP on port 3389. Now I can connect to my home PC (server) and access it remotely using RDC.

    My question now is this:

    Do most wifi networks have port 3389 allowed for TCP traffic? I assume they MUST, otherwise it would be left up to the client to configure each wifi they use to allow the traffic on that port, which would not typically be possible.
     
    grindy,
    #9
  11. 2009/08/12
    Scott Smith

    Scott Smith Inactive Alumni

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    Actually your situation was quite unusual. Her box must have a very tight policy on outbound traffic.

    With all the third party products out there now like Logmein or gotomypc RDP has become quite obsolete.
     
    Scott Smith,
    #10
  12. 2009/08/13
    digitaldreams

    digitaldreams Banned

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    Only outbound 3389 port will be required to be open. But it needs to be open on all in between devices from source to destination.
     
    digitaldreams,
    #11

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